PILS6 is a Temperature-sensitive Regulator of Nuclear Auxin Input and Organ Growth in

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2019 Feb 14

PMID 30755525

Citations 47

Authors

Elena Feraru

Mugurel I Feraru

Elke Barbez

Sascha Waidmann

Lin Sun

Angelika Gaidora

Jurgen Kleine-Vehn

Affiliations

Soon will be listed here.

Abstract

Temperature modulates growth and development throughout the entire lifecycle of a plant. High temperature (HT) triggers the auxin biosynthesis-dependent growth in aerial tissues. On the other hand, the contribution of auxin to HT-induced root growth is currently under debate. Here we show that the putative intracellular auxin carrier PIN-LIKES 6 (PILS6) is a negative regulator of organ growth and that its abundance is highly sensitive to HT. PILS6 localizes to the endoplasmic reticulum and limits the nuclear availability of auxin, consequently reducing the auxin signaling output. HT represses the PILS6 protein abundance, which impacts on PILS6-dependent auxin signaling in roots and root expansion. Accordingly, we hypothesize that PILS6 is part of an alternative mechanism linking HT to auxin responses in roots.

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